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Photoautotrophy loe1

QuestionAnswer
What is photoautotrophy? The process by which organisms (mainly plants) convert light energy into chemical energy, producing organic compounds for metabolism.
Why is photoautotrophy significant? It is fundamental to ecosystems, contributing to energy flow and nutrient cycling.
What are the two main functions of photosynthesis? Energy Production – Converts light energy into ATP & NADPH. Food Production – Forms organic molecules needed for life.
What are the key elements required for photosynthesis? Carbon (C) Nitrogen (N) Sulfur (S)
What role does Anabaena play in photosynthesis? It is involved in nitrogen fixation, converting atmospheric nitrogen (N₂) into bioavailable forms.
What are the roles of Photosystem II and Photosystem I? Photosystem II – Splits water (H₂O) to release oxygen (O₂) and generate electrons. Photosystem I – Produces NADPH, used in carbon fixation.
What does ATP Synthase do? It produces ATP from ADP and inorganic phosphate (Pi), fueling cellular processes.
What is Rubisco, and why is it important? Ribulose bisphosphate carboxylase is the key enzyme in CO₂ fixation, making it the most abundant protein on Earth and essential for sustaining life.
Nutrient Reduction Processes Carbon (CO₂) Fixed into carbohydrates Glucose, sugars Nitrogen (NO₃⁻) Reduced to amines Amino acids Sulfur (SO₄²⁻) Reduced to sulfide (S²⁻) Sulfur-containing amino acids
How does photosynthesis affect the environment? Fixes ~100 Gt of carbon annually. Releases ~260 Gt of oxygen into the atmosphere yearly.
Created by: REDZ17
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